Morphology and Antibacterial Properties of Composites Based on Polylactide and Manganese(III) Complex with Tetraphenylporphyrin

Film samples of composite material based on polylactide (PLA) and a manganese(III) complex with tetraphenylporphyrin containing 0.1–2 wt % are obtained. It is shown by spectrophotometry that this complex is distributed in the PLA matrix in the form of microinclusions. It is determined that the introduction of the porphyrin metal complex changes the glass transition and melting temperatures of polylactide by 1–2°C and increases the degree of crystallinity by 4–5%. It is found that the temperature corresponding to the maximum of the degradation peak of composites is 2–7°C lower compared to pure PLA. The antibacterial effect of the obtained composites against bacteria Staphylococcus aureus , Salmonella typhimurium , and Escherichia coli is shown.